mirror of
				https://github.com/django/django.git
				synced 2025-10-31 01:25:32 +00:00 
			
		
		
		
	Co-authored-by: Mariusz Felisiak <felisiak.mariusz@gmail.com>
Backport of 4d99375b46 from master
		
	
		
			
				
	
	
		
			98 lines
		
	
	
		
			2.9 KiB
		
	
	
	
		
			Python
		
	
	
	
	
	
			
		
		
	
	
			98 lines
		
	
	
		
			2.9 KiB
		
	
	
	
		
			Python
		
	
	
	
	
	
| from django.db import models
 | |
| 
 | |
| 
 | |
| class City(models.Model):
 | |
|     id = models.BigAutoField(primary_key=True)
 | |
|     name = models.CharField(max_length=50)
 | |
| 
 | |
| 
 | |
| class Country(models.Model):
 | |
|     id = models.SmallAutoField(primary_key=True)
 | |
|     name = models.CharField(max_length=50)
 | |
| 
 | |
| 
 | |
| class District(models.Model):
 | |
|     city = models.ForeignKey(City, models.CASCADE, primary_key=True)
 | |
|     name = models.CharField(max_length=50)
 | |
| 
 | |
| 
 | |
| class Reporter(models.Model):
 | |
|     first_name = models.CharField(max_length=30)
 | |
|     last_name = models.CharField(max_length=30)
 | |
|     email = models.EmailField()
 | |
|     facebook_user_id = models.BigIntegerField(null=True)
 | |
|     raw_data = models.BinaryField(null=True)
 | |
|     small_int = models.SmallIntegerField()
 | |
|     interval = models.DurationField()
 | |
| 
 | |
|     class Meta:
 | |
|         unique_together = ('first_name', 'last_name')
 | |
| 
 | |
| 
 | |
| class Article(models.Model):
 | |
|     headline = models.CharField(max_length=100)
 | |
|     pub_date = models.DateField()
 | |
|     body = models.TextField(default='')
 | |
|     reporter = models.ForeignKey(Reporter, models.CASCADE)
 | |
|     response_to = models.ForeignKey('self', models.SET_NULL, null=True)
 | |
|     unmanaged_reporters = models.ManyToManyField(Reporter, through='ArticleReporter', related_name='+')
 | |
| 
 | |
|     class Meta:
 | |
|         ordering = ('headline',)
 | |
|         index_together = [
 | |
|             ["headline", "pub_date"],
 | |
|             ['headline', 'response_to', 'pub_date', 'reporter'],
 | |
|         ]
 | |
| 
 | |
| 
 | |
| class ArticleReporter(models.Model):
 | |
|     article = models.ForeignKey(Article, models.CASCADE)
 | |
|     reporter = models.ForeignKey(Reporter, models.CASCADE)
 | |
| 
 | |
|     class Meta:
 | |
|         managed = False
 | |
| 
 | |
| 
 | |
| class Comment(models.Model):
 | |
|     ref = models.UUIDField(unique=True)
 | |
|     article = models.ForeignKey(Article, models.CASCADE, db_index=True)
 | |
|     email = models.EmailField()
 | |
|     pub_date = models.DateTimeField()
 | |
|     body = models.TextField()
 | |
| 
 | |
|     class Meta:
 | |
|         constraints = [
 | |
|             models.UniqueConstraint(fields=['article', 'email', 'pub_date'], name='article_email_pub_date_uniq'),
 | |
|         ]
 | |
|         indexes = [
 | |
|             models.Index(fields=['email', 'pub_date'], name='email_pub_date_idx'),
 | |
|         ]
 | |
| 
 | |
| 
 | |
| class CheckConstraintModel(models.Model):
 | |
|     up_votes = models.PositiveIntegerField()
 | |
|     voting_number = models.PositiveIntegerField(unique=True)
 | |
| 
 | |
|     class Meta:
 | |
|         required_db_features = {
 | |
|             'supports_table_check_constraints',
 | |
|         }
 | |
|         constraints = [
 | |
|             models.CheckConstraint(name='up_votes_gte_0_check', check=models.Q(up_votes__gte=0)),
 | |
|         ]
 | |
| 
 | |
| 
 | |
| class UniqueConstraintConditionModel(models.Model):
 | |
|     name = models.CharField(max_length=255)
 | |
|     color = models.CharField(max_length=32, null=True)
 | |
| 
 | |
|     class Meta:
 | |
|         required_db_features = {'supports_partial_indexes'}
 | |
|         constraints = [
 | |
|             models.UniqueConstraint(
 | |
|                 fields=['name'],
 | |
|                 name='cond_name_without_color_uniq',
 | |
|                 condition=models.Q(color__isnull=True),
 | |
|             ),
 | |
|         ]
 |